Fix site_scons/site_init.py test failure on Windows by using 'type' instead of 'cat' if win32.
Fix site_scons/site_init.py test failure on Windows by using 'type' instead of 'cat' if win32.

timj/scons,andrewyoung1991/scons,andrewyoung1991/scons,timj/scons,andrewyoung1991/scons,timj/scons,andrewyoung1991/scons,andrewyoung1991/scons,timj/scons,timj/scons,andrewyoung1991/scons,timj/scons,timj/scons,timj/scons,timj/scons,andrewyoung1991/scons,andrewyoung1991/scons,andrewyoung1991/scons